package workflow

import (
	"context"
	"sync"

	"xagent/internal/coordinator"
)

// WorkflowManager manages project workflows
type WorkflowManager struct {
	coordinator *coordinator.TeamCoordinator
	workflows   map[string]*Workflow
	mutex       sync.RWMutex
	ctx         context.Context
	cancel      context.CancelFunc
}

// Workflow represents a project workflow
type Workflow struct {
	ID      string
	Stages  []*Stage
	Current int
	Status  string
}

// Stage represents a workflow stage
type Stage struct {
	Name         string
	Tasks        []*coordinator.Task
	Dependencies []string
	Status       string
}

// NewWorkflowManager creates a new workflow manager
func NewWorkflowManager(coordinator *coordinator.TeamCoordinator) *WorkflowManager {
	ctx, cancel := context.WithCancel(context.Background())
	return &WorkflowManager{
		coordinator: coordinator,
		workflows:   make(map[string]*Workflow),
		ctx:         ctx,
		cancel:      cancel,
	}
}

// CreateWorkflow creates a new workflow
func (wm *WorkflowManager) CreateWorkflow(id string, stages []*Stage) *Workflow {
	wm.mutex.Lock()
	defer wm.mutex.Unlock()

	workflow := &Workflow{
		ID:      id,
		Stages:  stages,
		Current: 0,
		Status:  "pending",
	}
	wm.workflows[id] = workflow
	return workflow
}

// StartWorkflow starts a workflow
func (wm *WorkflowManager) StartWorkflow(id string) error {
	wm.mutex.Lock()
	workflow, ok := wm.workflows[id]
	wm.mutex.Unlock()

	if !ok {
		return ErrWorkflowNotFound
	}

	workflow.Status = "running"
	return wm.executeStage(workflow, workflow.Current)
}

// executeStage executes a workflow stage
func (wm *WorkflowManager) executeStage(workflow *Workflow, stageIndex int) error {
	if stageIndex >= len(workflow.Stages) {
		workflow.Status = "completed"
		return nil
	}

	stage := workflow.Stages[stageIndex]
	stage.Status = "running"

	// Assign tasks to agents
	for _, task := range stage.Tasks {
		agent := wm.selectBestAgent(task)
		if err := wm.coordinator.AssignTask(task.ID, agent); err != nil {
			return err
		}
	}

	return nil
}

// selectBestAgent selects the most suitable agent for a task
func (wm *WorkflowManager) selectBestAgent(task *coordinator.Task) string {
	// Implement agent selection logic
	return ""
}
